The objectives of this research line encom … The objectives of this research line encompass the study of models, algorithms and platforms, which take into account the requirements of several classes of applications, with the aim of ensuring timely and safe operation. One of the major challenges to these objectives consists in assuming that applications, despite these demanding goals, can operate in open and unpredictable environments, like the Internet. The design of dependable and real-time applications is traditionally difficult, if not impossible, in this kind of environments. It is proposed to deal with this question in the context of intermediate or partial synchrony models, and by fitting the model and the resulting architectures with the appropriate paradigms and devices, namely accurate environment monitoring and quality of service (QoS) adaptation. g and quality of service (QoS) adaptation.